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آزمونهای درک مطلب

Multiple Choice Questions Test

1. The underlined word "its" in the passage refers to
A. quantum mechanics
B. wave-particle duality
C. the photoelectric effect
D. each photon

Feedback for Question 1:

The correct answer is D. The word "its" refers to "each photon," as photons are the discrete particles of light.

2. According to paragraph 2, the photoelectric effect demonstrates that
A. light can bend around obstacles
B. light sometimes behaves as a wave
C. light is made up of discrete energy packets
D. light can create patterns of bright and dark bands

Feedback for Question 2:

The correct answer is C. The photoelectric effect shows that light consists of discrete energy packets called photons.

Light exhibits a dual nature, behaving both as a wave and a particle. This concept, known as wave-particle duality, was first proposed in the early 20th century when scientists observed that light sometimes acted as a continuous wave, spreading and diffracting, and at other times behaved as discrete particles called photons. [1]